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AssigneeCatalytica, Inc.
InventorsJohn H. Grate, David R. Hamm, Robert J. Saxton, Mark T. Muraoka
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The present invention provides aqueous catalyst solutions useful for oxidation of olefins to carbonyl products, comprising a palladium catalyst, a polyoxoacid or polyoxoanion oxidant comprising vanadium, and chloride ions. It also provides processes for oxidation of olefins to carbonyl products, comprising contacting olefin with the aqueous catalyst solutions of the present invention. It also provides processes for oxidation of olefins to carbonyl products by dioxygen, comprising contacting olefin with the aqueous catalyst solutions of the present invention, and further comprising contacting dioxygen with the aqueous catalyst solutions. The present invention also provides a process for the oxidation of palladium(0) to palladium(II) comprising contacting the palladium(0) with an aqueous solution comprising chloride ions and a polyoxoacid or polyoxoanion oxidant comprising vanadium.
An aqueous palladium catalyst solution for the oxidation of an olefin to a carbonyl product comprising a palladium catalyst, a polyoxoanion oxidant comprising vanadium, and chloride ions, wherein the concentration of said chloride ions is greater than twice the concentration of said palladium catalyst and at least 5 millimole per liter.
A process for oxidation of an olefin to a carbonyl product comprising:
In an aqueous palladium catalyst solution for the oxidation of an olefin to a carbonyl product comprising a palladium catalyst and a polyoxoanion oxidant comprising vanadium, the improvement wherein the solution further comprises chloride ions at a concentration greater than twice the concentration of said palladium catalyst and at least 5 millimolar per liter.
In a process for oxidation of an olefin to a carbonyl product comprising reacting the olefin with an aqueous catalyst solution comprising a palladium catalyst and a polyoxoanion oxidant comprising vanadium at conditions sufficient to oxidize the olefin to a carbonyl product, the improvement wherein the solution further comprises chloride ions at a concentration greater than twice the concentration of said palladium catalyst and at least 5 millimolar per liter.
Dependencies are inferred from the claim text.